how to treat blown plaster?

Answer 1

if it is blown you will hear a hollow sound when you tap it .You need to remove all the loose plaster from the wall and replace it with new if the wall is brick you will need to use a undercoat plaster first called browning then you will have to wait a couple of hours for that to set it also needs to cut back a little so the edges of the patch you are replacing are clean and when you apply the top coat or finish as its called you can use thistle multi finish you have a nice clean flat patch to decorate you can also get one coat plaster but you have to carefull when applying it to deep holes as it slides use a stick or something with a straight edge that will go all the across the patch to get it level and smooth it off as it dries dont worry if you leave it a little rough just sand it when it is set and remember that before you put any plaster on the wall give the patch a good wetting down with some water it will kill the suction a little hope this helps

Answer 2

Blown Plaster

Answer 3

First remove the blown plaster, if as you remove the blown plaster the rendering behind the plaster comes of then you need to fix this first. Once you have taken of the blown plaster, you can then re-plaster the wall. If it only a small area the you can use Filler, If the area is larger then you need to use plaster. To do this you will need (1) a Laying on trowel (from any decent d.i.y store) (2) A plasterers hawk (also from d.i.y store) (3) A bucket (4) a bag of plaster ( in the UK get a bag of multi finish). To do the job fill the bucket with a third of water then add the plaster mixing it with a stick of some sort till it looks like a soft cream, then wet the area you need to plaster with water ( just so it's moist), then scoop out some plaster and place it on the hawk with the trowel scoop the plaster on to the trowel and apply to the area you need to re-plaster, and smooth out, leave till it starts to go hard then splash with water and go over with the trowel. this gives you a nice smooth finish. Then leave for a day or two till it is completely dry then it is ready to decorate. If the rendering behind the plaster has come away then you will need to repair this. If the wall is not damp then you can use Bonding (uk) you mix this like the plaster except it needs to be a bit more drier ( as we say in trade stiffer). If this may seems a bit too difficault, but it's not. If you don't feel like takleing this your self then you will have to call in a reputable builder.
Hope this is of help to you

Answer 4

There is only one way to effectively treat blown plaster. It should be scraped off, until you find the plaster is really stuck to the bonding. This patch should then be re-skimmed (if large) or filled with filler (if only a small patch) and sanded down smooth to finish.

Answer 5

read gary fs, answer spot on. the only thing i would add is find out why the plaster has blown there may be some other remedial work that is required ,to stop the samething re occuring. LF

Answer 6

I usually throw him out.. oh..you didn't say plasterer, you said plaster

Answer 7

Rub it down and use polyfiller

Answer 8

polyfiller